1. Effectively improve phosphating quality.
In order to fully control the quality of automobile painting, we must first start with pretreatment, and improving the quality of phosphating is undoubtedly the key link of pretreatment. Therefore, we should explore the improvement of phosphating quality. First of all, in order to effectively improve the adhesion and corrosion resistance of paint film, it is necessary to enhance the P ratio of phosphating film as much as possible. Generally speaking, immersion phosphating can increase the concentration of phosphate to a certain extent, and then improve the P ratio of phosphating film. Secondly, adding equal weight of metal ions into the phosphating solution is also beneficial to improve the phosphating performance of zinc salts, especially for galvanized steel plates. The first method has been widely used abroad and achieved good results. In addition, the improvement of equipment is also helpful to improve the quality of phosphating. The use of advanced automation equipment is not only conducive to improving the process, but also makes each process of painting more accurate. If an automatic spraying device is installed, it can effectively prevent the substrate from being pricked or corroded in the pretreatment stage. In addition, the specific components of phosphating solution can be effectively seen by using advanced instruments, which effectively solves the problem of incomplete analysis of phosphating solution components.
2. Further improve the coating quality.
The development of thick film and thick film cathodic electrophoretic coatings is beneficial to improve the smoothness of automobile surface and enhance the corrosion resistance of semi-closed structure. Because of the poor performance of common cathodic electrophoretic paint, it is easy to sag and shrink in size. It is necessary to conduct in-depth research on electrophoretic paint in combination with developed foreign technology to gradually improve the area grade. For example, different types of cars have different requirements for painting quality, and some cars have high requirements for painting quality. Although acrylic paint is a new type of paint with high price, it has good performance and broad development prospects. Among them, the gloss retention of China Shuanghu brand propylene coating is very good. Replacing amino paint with it will not only help to upgrade the regional grade, but also effectively deepen the regional color and fully meet people's diversified needs for automobiles.
3. Improve the painting process
Since 1990s, the automobile painting process in China has basically formed the process form of 3C2B, which is what we call "primer+intermediate coat+varnish", but this process not only consumes too much energy, but also requires relatively high cost. Therefore, it is necessary for us to choose specific measures to improve this situation: for this, we can properly choose electrophoretic paint film with thickness equal to or less than 20 microns, and choose high-solid metallic paint with high matching degree and good performance with primer; At the same time, use glue with strong adhesion, short drying time and good viscosity. Through the above measures, the intermediate painting process of automobile painting process is appropriately reduced, that is, the glue and topcoat are dried at the same time, thus helping relevant manufacturers to effectively reduce the capital investment required for glue drying equipment and achieve the purpose of effectively saving costs and energy consumption.
The coating drying conditions also directly affect the coating quality. At present, most of our country choose tunnel drying tunnel and use far infrared drying, but it is difficult to achieve drying effect because of low emissivity. Therefore, in order to fully enhance the drying effect, we can combine the vibration wavelength of paint molecules with infrared rays and set a scientifically designed radiation distance.
4. Improve the quality of painters in an all-round way.
Operators' own morality plays a very important role in improving the quality of automobile painting, so it is necessary for us to train operators properly. On the basis of comparing the requirements of paint quality and automobile production, relevant enterprises can guide and learn the operators on time, so that they can correctly understand the importance of painting. At the same time, we can also regularly provide professional and technical training to operators to ensure that they have skilled operation skills, and appropriately popularize safety education to them, which is conducive to their smooth operation and orderly painting work. In addition, the relevant enterprises can also properly establish a quality assessment and reward and punishment system, effectively assess the behavior of employees and choose the reward and punishment measures they want to use, improve the sense of responsibility and concentration of painting personnel, and provide the necessary guarantee for high-quality painting.